Oil burner



L. \WILCOX April 26, 1932.

OIL BURNER 2 Sheets-Sheet Filed Aug. l, 1.928

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Patented Apr. 26, 1932 UNITED STATES LEROY WILCOX, OF DETROIT, MICHIGAN,

PATENT OFFICE ASSIGNOR, BY MESNE ASSIGNMENTS, T0

COPE-SWIFT COPORATION, A CORPORATION 0F MICHIGAN OIL BURNER Application led August 1, 1928. Serial No. 296,766.

y ing a pair of rotating cups, one of which is positioned within the other, oil being fed into 1 the inner cup from which it is discharged in a finely divided state into the outer cup from which it is finally discharged into the air stream. y

' Another object is to provide, in combination with the atomizing-cup of an oil burner, an auxiliary atomizing means comprising a rotatable member adapted to discharge oil therefrom into the interior of the atomizing cup.

A further object is to provide atomizing means for an oil burner comprising a cupshaped member having therein an auxiliary atomizing member spaced from the walls thereof, such auxiliary member being provided with means at its discharge end whereby oil fed to the interior thereof'will be broken up by said means in being discharged from said auxiliary member into the cup member. i

The above being among the objects vof the present invention, the same consists in certain features of construction and combinations of parts to be hereinafter described with reference to the accompanying drawings, and then claimed, having the above and other objects in view.

In the accompanying drawings which illustrate suitable embodiments of the present invention, and in which like numerals refer 'to' like parts throughout the several views,-

Fig. 1 is a vertical sectional view taken through the longitudinal center of an oil burning apparatus constructed in accordance with the present invention.

Fig. 2 is an enlarged fragmentary sectional view showing the inner vaporizing cup or member.

Fig. 3 is an enlarged fragmentary sectional View showing a modification of the inner vaporizing cup or member.

Fig. 4 is a sectional view taken on the 4-4 of Fig. 3.

Figs; 5 and 6 are enlarged fragmentary sectional views of other modifications of the inner vaporizing cup or member.

As indicated in the drawings, a supporting platemember 16 is provided which is adapted to close an opening in a furnace and line lmay be secured thereto by screws or other suitable means, not shown. The plate 16 is open at its center and extending inwardly.

therefrom with its walls in inwardly converging relationship is a casing 18 which may be integrally formed with the plate 16. vA circular casing 19 is secured to the inner end of the casing 18 by bolts such as 20 and nuts 21 which pass through anges 22 and 23 formed on the casings 18 and 19 respectively, and extends inwardly therefrom with its walls in outwardly diverging relationship. Closing the rear face of the open center of the plate 16 is a plate 24 provided with a relatively large central opening 25, it being held in place by being clamped between the flange 26 of the motor supporting frame 27 and the plate 16. The motor supporting frame 27 which extends outwardly from the plate 24- is located on the plate 16 by means of the dowels 28 and is secured thereto by means of screws 29. The supporting frame 27 lis provided with a plurality of openings 30 around its circumference for the entrance of air to the interior of the same.

Removably secured within the rear end of the frame 27 by means of set screws 31 is an electric motor comprising a casing 32, armature 33, armatureshaft 34 and bearings 35 and-36, the casing 32 extendin into the frame 27 to a point rearwardly of t e .openings 30 so as not to restrict the iiowv of air through the latter. To the inner end of the armature shaft 35 is secured an extension 37 by 'means of a screw 38, the extension 37 terminating in a flange 39Abetween which and the sleeve 40 a fan 41 is clamped. A cupshaped member 42 is secured to the inner end of the sleeve 40 by means of screws 43 which project through the bottom of the cup 42, the flanges of the sleeve 40, the fan 41, and are threadably received in the flange 39 of the extension 37 thus serving to secure all of these parts in assembled relationship. The armature shaft and extension are hollow and extending through the same from the outer end of the motor, and rotatable relative thereto, is an oil delivery tube 44 which terminates at its inner end adjacent the bottom of the cup 42. A second cup member 45 havingan opening in its otherwise closed end for the passage of the tube 44 is secured within the sleeve 40 and extends from the inner end of the extension 37 to a point inwardly spaced from the bottom of the cup 42. Suitable packing 47 is secured in the cup 45 around the tube 44 by means of a nut 48 in order to prevent leakage of oil from the interior of the cup 45 back around the outside of the tube 44 to the motor. In Figs. 1 and 2 the inner edge of the cup 45 is provided with a plurality7 of radial notches or slots 40.

The outer end of the tube 44 which projects out past the rear end of the motor casing 32 is provided with a connection 53 which serves to connect itl to a shut-off valve 54. The shut-off valve 54 is connected by a line of piping 55 to a source of oil supply; valves and other mechanism shown in the parent application above referred to, being vopen end until it reaches the notches 50, the

oil thereupon being thrown by centrifugal force through the notches inthe form of a fine spray against the inner surface of the cup 42. The oil being fed into the cup 42 is caused by its rotation and the centrifugal forceA actingupon it to form in a thin film over the interior of the cup 42 and be gradually carried to the open end thereoffrom which it is thrown off into the air stream between the cup 42 and easing 19 in the forni of a finely divided mixture. Part of the oil thrown out of the cup 45 is vaporized by the heat to which the inner end fof the apparatus is subjected7 and part is vaporized by coming in contact with the air in the finely divided state in which it is thrown out of the cup 45 and this vaporization aids from the flanged sleeve element 40 but as having an outside diameter which corresponds to the. diameter of an opening in the bottom of the outer cup element 42 and adapts it to interfit with the sleeve element 40 and/or the fan element 41 and to abut the hollow shaft element 37, although projecting but slightly inward beyond said bottom opening, may be formed in a variety of different ways so that the oil being discharged therefrom into the outer cup 42 will be broken up in the manner described. In Figs. 3 and 4 one modification of the same is shown. In this case the inner cup 45 has its inner surface serrated as at 56 and the inner end face is backwardly beveled as at 57, the point where the face 57 iiiter-connects the seri-ations 56 presenting a plurality of tooth-like projections 58 which act to break up the oil being discharged therefrom to the outer cup element in a manner similar to that which is effected by the use of the grooves 50 in Figs. 1 and 2.

In Figs. 3 and 4 the inner end of the inner cup 45 is provided with a peripheral rib 55) which acts to prevent any oil from travelling` back along the outside of the cup 45 and thereby come in contact with the bottom of the cup 42.

In Fig. 5 another modification of the inner cup 45 is shown. In this case the outer surface of the inner end of the cup 45 is threaded and a cap member 60 is screwed onto the same, the cover Obeing provided with a. plurality of radially extending openings 61 which serve the same purpose as the slots 50 and teeth 58 in the preceding figures.

The construction shown in Fig. 5 may be modified as shown in Fig. G in which the inner surface of the inner end of the cup 45 is internally threaded and is provided with a plug 62, a plurality of radially extending openings 63 being provided in the cup 45 adjacent, the plug 62 to effect the same result as the openings 61 shown in Fig. 5. Fui" thermore, in Fig. 6 the inner wall 64 of the cup 45 is shown as diverging outwardly to` ward the discharge end of the same in ordeito facilitate the travel of the oil toward the discharge end thereof during rotation of the same.

Each of the foregoing constructions will be seen to include, regardless to the specic configuration of the inner cup element, special means for holding the same in concentric and leak-'obviating relationship to a fianged spool element and/or to an outer cup ele- 'nient having a substantially fiat bottom through which extends only an edge of said inner cup element, adapted substantially to close the central opening therein.

It will be obvious that there are other ways of modifying the construction of the inner cup shown to achieve substantially the same result as herein described.

Formal changes may be made in the specific embodiment without departing from the spirit or substance of the broad invention, the scope of which is commensurate with the appended claims.

What I claim is:

l. In an oil burner, in combination, a rotatableclosed bottom cup disposed with its axis in a substantially horizontal plane, a second cup within the first mentioned cup and rotatable therewith, said second cup being provided with a plurality of oil discharge points, a peripherally extending flange on said second cup between said points and the bottom of the first mentioned cup, and means for feeding oil into said second cup.

2. In an oil burner, in combination, a pair of rotatable closed bottom cups one disposed within the other, the inner of said cups being formed to discharge a plurality of circumferentially spaced streams of oil lally of said cup, surface of said cup being therefrom into the outer of saidcups, an outwardly radially extending flange on the inner of said cups between said points of discharge thereon and the bottom of the outer of said cups, and means for feeding oil into the inner of said cups.

3. In an oil burner, in combination, a rotatable cup adapted to receive a flow of oil, the interior of said cup being serrated axially of said cup, and the open edge surface of 4said cup being beveled towards the axis of said cup and away from the bottom thereof.

a. I n an oil burner, in combination, a rotatable cup adapted tov receive a flow of oil, certain walls of said cup being serrated axand the open end edge beveled whereby to form a plurality of axially extending notches in the free edge of said cup where said end surface intersects said serrations, for discharging the oil from said cup in a plurality of separate streams.

5. In an oil burner, in combination, a rotatable oil, the interior walls of said cup being serrated axially of said cup, and a radially outwardly extending flange at the open .end of said cup, that surface of said flanI e and cup most remote from the bottom 0% said cup being beveled towards the axis of said cup and away from the bottom of said cup whereb a plurality of notches are formed at the ree edge of said cup Where said most remote surface intersects said sel-rations.

6. In a burner organization comprising a fan element, an outer cup. element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil of the invention described:

vshaft element through which cup adapted to receive aflow 0fi coaxialA and leak-ob feed tube, means for uniting said ele-ments 41n coaxial and leak-obviating relationship lcup elements,-said inner cup element belng so received within said sleeve element as to project but slightly within said outer cup element.

8. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged with means for thel support oaf both of said cup elements-said outer cup element including a substantially flat bottom portion having a central opening through which said inner cup element extends.

9. In a burnerl organization comprisinga fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with meansfor the support of both of said cup elements,-said outer cup element including a substantially flat bottom portion through which extend bolts which are received by said sleeve element.

10. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and 4leak-obviating rela-v tionship which comprises: a flanged sleeve provided with means for the support of both of saidcup elements,-said outer cup e1ement including a substantially flat bottom portion through which extend bolts which are received by said sleeve element, said bolts extending also into engagement with said fan element.l

11. In a burner organizationcomprising a fan element, an outer cup element, and an 1nner cup element all rtatable by a hollow shaft element through which extends an oil feed tube, means for uniting said elements in viating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,-said outer cup element includsleeve provided shaft element through tending also into engagement with said shaft element.

12. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow7 shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,-said outer cup element including a substantially fiat bottom portion through which extend bolts which are received by said sleeve element, flanges on said sleeve being respectively engageable `with said outer cup element and with another of the mentioned elements.

13. In a burner organization comprising a fan` element, an outer cup element,v and an linner cup element all rotatable by a. hollow which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: aflanged sleeve provided with means for the support of both of said cup elements,-said outer cup element being provided with a central opening in the bottom thereof and said inner cup element being of substantially the same diameter as said opening.

14. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,said inner cup element having an outside diameter which corresponds to the inside diameter of said sleeve.

15. In a burner organization comprising a fan element, an outer cup element, and an nner cup element all rotatable by a hollow .shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup eleInents,-said outer cup element being provided with a central opening in the bottom thereof and said inner cup being of such size and shape as to project slightly inward through said bottom opening when secured within said sleeve element.

16. In a burner organization comprising a fan element, an outer cup element, and an in\ ner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for unitin said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,-said inner cup element being adapted to intert within two of the mentioned elements.

17. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,-said inner cup element being interiorly provided with threaded means for the retention of packing therein.

18. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube, means for uniting saidelements in coaxial and leak-obviating relationship which comprises: a ianged sleeve provided with means for the support of both of said cup elements,-said inner cup being interiorly grooved and the open end of said Cup being provided with a backwardly beveled face whereby tooth-like projections are formed at an inner edge thereof.

19. In a burner organization comprising a fan element, an outer cup element, and an inner cup element all rotatable by a hollow shaft element through which extends an oil feed tube means for uniting said elements in coaxial and leak-obviating relationship which comprises: a flanged sleeve provided with means for the support of both of said cup elements,said outer cup element including a substantially flat bottom portion having a central opening through which said inner cup element extends, said inner cup having a beveled face which inwardly terminates in teeth and a peripheral rib being provided at the outer edge of said beveled face.

LEROY VVILCOX. 

